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2 Sheets-Sheet 1.

(No Model.)

E. W. MGGORMICK.

SELF CLOSING 000K.

No. 245,737. Patented Aug. 16,1881. A

n.u'magmphw, washingm n, c.

(No Model.) 2 Sheets-Sheet 2.

E. W. M cGO-RMICK. SELF CLOSING 000K.

No. 245,737. Patented Aug. 16,1881.

N. PETER; mwunwgmpher. wmngmm D. c.

UNITED STATES PATENT OFFICE.

EDWARD W. MCOORMICK, OF NEW YORK, N. Y., ASSIGNOR TO CHARLES HARRISON, OF SAME PLAGE.

SELF-CLOSING COCK.

SPECIFICATION forming part of Letters Patent No. 245,737, dated August 16, 1881.

Application filed .Tune 11, 18H1. (No model.)

To all whom it may concern:

Be it known that I, EDWARD W. MCCOR- MIGK, of the city and State of New York, have invented certain Im provernentsin Self-Closin g Cocks, of which the following is a specilication.

My improvements relate to that class of selfclosing cocks in which the valve is held upon its seat by the expansive force of a spiral spring, either with the aid of the water-pressure in the pipe or against suoli pressure, according to the manner in which the valve is arranged.

In the accompanying drawings I have illustrated two methods of applying my invention. In one the water-pressure tends to hold the valve upon its seat, permittin ga lighter spring to be used, and in the other, by means of a stiffer spring, the valve is held upon its seat against the pressure of the water.

In the accompanying drawings, illustrating cocks embodying my improvements, Figure 1 is an elevation, partly in vertical section, of what I regard as the preferable form of applying my improvement,in which the water-pressure co-operates with the force of the spring in holding the valve upon its seat. Fig. 2 is a horizontal section of the shell of the cock through the line w a: on Fig. I. Fig. 3 is a longitudinal vertical section of the shell of a cock containing my improvement,in which the valve is held upon its seat against the pressure of the water by a more powerful spiral spring. Fig. 4 is a horizontal section thereof, taken .through the line y y on Fig. 3.

In that modification of my invention represented in Figs. 1 and 2 the shell A of the cock is divided into two chambers, the inlet chamber B, the upper horizontal extension of which constitutes the valvechamber b, and the outlet chamber C, the vertical extension c of which is provided at the top with the cap c', which affords the upper bearing for the spindle D, by the oscillation of which in either direction the valve E is pushed backward from its seate.

The range of oscillation ofthe spindle is limited by means of a radially-projectin g tooth, d, which, at either end of its path of oscillatory motion, is arrested by collision with the The valve is provided with a projection, E',

which presents a ilat bearin g for the rocking lever D3, by which the valveis operated. This rocking lever may either be a piece affixed transversely to the spindle, or, as represented in the drawings, it may be a flattened portion of the spindle itself.

The valve-stem E2 is journaled in the recess e', formed in the rear wall of the valve-chain ber, and the spiral spring E3, surrounding the valve-stem, tends to thrust the valve against its seat.

In the modification represented in Figs. 3 and 4 the shell G of the cock is divided into two chambersthe inlet-chamber H and the outlet-chamber I. In this case the valve K is affixed to or formed in one piece with the branches 7c k of the stem K', having its end bearing in the perforated pillar i, fastened transversely across the outlet-chamber. On the other end the valve is aflixed to the stem K2, which has its bearing in the pillar h, fastened transversely across the inlet-chamber. An expanding spiral spring, L, bears at one end against the pillar fi, and at the other end against the cross-head 7c', of the stem K', which connects the branches k k, to which the valve K is attached.

A vertical extension, I', of the outlet-chamber is provided with the cap I2, which affords the upper bearing for the spindle M.

At its lower end, m, the spindle is stepped in the cylindrical recess I3, formedin the bottom of the outlet-chamber. The spindle is inserted through the space between the valve K and the cross-head lc' of the stem K', and is provided with a flattened face to form the rocking lever M', which bears upon the surface of the cross-head 7c'.

As in the other modification of my invention,

the spindle is provided With a fixed collar, M2; which bears against a Washer introduced bctween it and the under side of the cap l2, and is also provided with the projecting teeth m m', which serve to arrest the oscillatory movement ot' the spindle by striking against stops projecting inwardly from the Wall of the vertical extension of the outlet-chamber.

The Valve K is held upon its seat K3 solely b v the expansive force ot' the spiral spring L, which in this case must be strong enough to resist the pressure of the tluid in the inletchamber H.

It will be seen that-by oscillating the spindle M in either direction the valve K will be Withdrawn from its seat, and that upon letting go of the spindle the spiral spring will force the l valve back upon its seat, and atthe-same time rock the spindle around into its normal position.I

I claim as my invention- In a self-closing cock substantially of the character described, a retracting spring-valve and an oscillating spindle carrying a rocking lever or iiattened face for operating such valve, 25 and provided With the radially-projectingtooth d, in combination with the stops c2, for limiting the range of oscillation of the spindle, substantiallT as set forth.

EDWARD W. MCOORMICK.

Witnesses:

W. P. ToWNE, W. S. MoOoRMroK. 

